As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, RECEIVED A CREW OXYGEN LOW ECAM WARNING. SYSTEM INDICATED 60 PSI AT LANDING. EMERGENCY DECLARED. LANDING UNEVENTFUL. AIRCRAFT GROUNDED. MAINTENANCE FOUND CAPTAIN`S OXYGEN MASK LEAKING. REMOVED AND REPLACED MASK IAW AMM 35-11-18 AND ACCOMPLISHED LEAK CHECK. SYSTEM CHECKED NORMAL.